Monohydride complexes of molybdenum(IV) and tungsten(IV) containing bulky thiolate ligands: X-ray crystal structures of [MH(SC6H2PrI3-2,4,6)3(PMe2Ph)2], M = Mo or W

Abstract

The complexes [MH(SC₆H₂R₃-2,4,6)₃(PMe₂Ph)₂]1(M = Mo or W, R = Me or Prⁱ) and their deuterio analogues have been prepared. The X-ray structures of 1(M = Mo or W, R = Prⁱ) have been determined, showing the overall geometry in both to be based on a distorted trigonal-bipyramidal arrangement of thiolates with the phosphines essentially trans to each other. The hydride ligand could not be located by X-ray diffraction in either structure, but its presence is established by spectroscopic studies. The preparation of [MoBr(SPh)₃(PMe₂Ph)₂] is also described.